include/linux/kernel.h

9 #define SHRT_MIN	((s16)(-SHRT_MAX - 1))
11 #define INT_MIN		(-INT_MAX - 1)
14 #define LONG_MIN	(-LONG_MAX - 1)
17 #define LLONG_MIN	(-LLONG_MAX - 1)
25 #define S8_MIN		((s8)(-S8_MAX - 1))
28 #define S16_MIN		((s16)(-S16_MAX - 1))
31 #define S32_MIN		((s32)(-S32_MAX - 1))
34 #define S64_MIN		((s64)(-S64_MAX - 1))
40 #define ALIGN(x,a)		__ALIGN_MASK((x),(typeof(x))(a)-1)
43 #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)
53 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
54 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
57 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
58 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
63 #define DIV_ROUND_UP_ULL(ll, d)		DIV_ROUND_DOWN_ULL((ll) + (d) - 1, (d))
71 /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
75 	(((x) + (__y - 1)) / __y) * __y;		\
81 	__x - (__x % (y));				\
94 	(((typeof(x))-1) > 0 ||				\
95 	 ((typeof(divisor))-1) > 0 || (__x) > 0) ?	\
97 		(((__x) - ((__d) / 2)) / (__d));	\
114  * upper_32_bits - return bits 32-63 of a number
117  * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
119  * 32-bits.
124  * lower_32_bits - return bits 0-31 of a number
130  * abs() handles unsigned and signed longs, ints, shorts and chars.  For all
131  * input types abs() returns a signed long.
132  * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
135 #define abs(x) ({						\  macro
139 			ret = (__x < 0) ? -__x : __x;		\
142 			ret = (__x < 0) ? -__x : __x;		\
149 		(__x < 0) ? -__x : __x;		\
154  * strict type-checking.. See the
173  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
183  * clamp - return a value clamped to a given range with strict typechecking
210  * clamp_t - return a value clamped to a given range using a given type
222  * clamp_val - return a value clamped to a given range using val's type
236  * swap - swap value of @a and @b
242  * container_of - cast a member of a structure out to the containing structure
249 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
250 	(type *)( (char *)__mptr - offsetof(type,member) );})